摘要
针对低频声校准，阐述了一种传声器低频（0．1～250Hz）校准的新方法。通过特制低频参考传声器组的频响曲线对比得到参考传声器相对于251．2Hz的频率响应值，然后再通过比较法得到被测传声器的频率响应值，从而实现了传声器低频校准，通过测量实验以及误差分析验证了所提出模型的有效性和实用性。
A new method for frequency response calibration of measured microphones over the range of 0. 1 to 250 Hz is described. If required, these frequency response calibrations can be combined with absolute sensitivity calibrations at 251.2 Hz. They might either be performed by comparison with another microphone or by using a calibrated sound source. The effectiveness and practicality of the method are verified by the measurement experiments and datum analysis.
出处
《计量学报》
CSCD
北大核心
2013年第4期383-386,共4页
Acta Metrologica Sinica
关键词
计量学
参考传声器
低频校准
耦合腔互易法
均压孔
频响曲线
Metrology
Reference microphone
Low-frequency calibration
Reciprocity calibration
Vents
Frequency response curve
